期刊名称：Scientific Journals of the Maritime University of Szczecin
印刷版ISSN：1733-8670
电子版ISSN：2392-0378
出版年度：2017
卷号：50
页码：105-111
DOI：10.17402/223
语种：English
出版社：MUS
摘要：Mobile navigation for inland shipping is an example of a GIS system dedicated for recreational users using inland waterways.Developing this system is a primary purpose of the research project "Mobile Navigation for Inland Waters” funded by the National Centre for Research and Development under the program LIDER.System assumptions include the development of a dedicated model of mobile cartographic presentation,taking into account the generalization of data.This article is focused on simplification of line and polygon features,included in the spatial data model MODEF (MObinav Data Exchange Format),which is used in the created system.During the simplification of line features,the Douglas–Peucker algorithm was mainly implemented.During the simplification of polygon features,a simplification method was applied,maintaining the basic shape and size of the objects.A simplification tolerance parameter and a parameter determining the minimum area of the object was also used.In addition,objects within a certain distance were merged.A smoothing tool for the shape and size of buildings and the PEAK method (Polynomial Approximation with Exponential Kernel) were used as well.Furthermore,a selection tool was employed and features with minor importance to the user were deleted during navigation mode.Given the requirements of the future user of the system,a separate model simplification for each of the layers of the system was created;these models are combinations of the methods listed above.The overriding factor that has been taken into account during the research of simplification methods,was the limitation of the sharpness of human eyes.The study of generalization methods was carried out in ArcGIS software.
其他摘要：Penelitian ini bertujuan untuk mengetahui pengaruh informasi terhadap pengambilan keputusan investor berdasarkan teori Efficient Markets Hypothesis (EMH),yang diungkapkan oleh Fama (1970),dengan menguji pengaruh beberapa variabel independen terhadap cost of capital (COC).Variabel independen yang digunakan untuk mencerminkan informasi tersebut antara lain;pengungkapan sukarela,asimetri informasi,beta saham,ukuran perusahaan,dan kepemilikan institusional.Penelitian ini menggunakan teknik purposive sampling dalam melakukan penyampelan terhadap 131 perusahaan manufaktur yang terdaftar di Bursa Efek Indonesia tahun 2011,yang menghasilkan 75 sampel penelitian.Penelitian ini menggunakan linier regression untuk menganalisis data.Hasil penelitian ini mengindikasikan adanya pengaruh informasi terhadap pengambilan keputusan investor,yang dilihat dari hasil uji simultan yang menunjukan seluruh variabel secara bersamaan member pengaruh terhadap COC.Hasil penelitian ini juga menunjukan bahwa variabel pengungkapan sukarela,beta saham,dan ukuran perusahaan secara parsial memberikan pengaruh terhadap COC,sedangkan variabel asimetri informasi dan kepemilikan institusional secara parsial menunjukan tidak ada pengaruh terhadap COC..
关键词：simplification;inland shipping;geodata integration;mobile systems
